J.  Nuorteva, ?[Pseudoclavellaria amerinae (Linnaeus) (Hymenoptera: Cimbicidae)]?, Entomologica Fennica, vol. 10, p. 3, 1999.

M.  Heidemaa, ?A new sawfly species Caliroa crypta sp. nov. from Northern Europe (Hymenoptera: Tenthredinidae)].?, Entomologica Fennica, vol. 10, pp. 183-186, 1999.

V.  Vikberg and Itämies, J., ?Buckthorn (Hippophaë rhamnoides L., Elaeagnaceae), a new important food plant for the larva of Tenthredo vespa Retzius in Finland (Hymenoptera: Tenthredinidae).?, Entomologica Fennica, vol. 10, pp. 201-208, 1999.

V.  Vikberg, ?Lathroplex anthreni  sp. n. (Hymenoptera, Ichneumonidae), a parasitoid on Anthrenus museorum (Linnaeus) in southern Finland.?, Entomologica Fennica, vol. 10, pp. 239-244, 1999.

L.  Sundström, ?Myrornas liv ? en värld av konflikter?,  Sphix Årsbok 1998-1999, 1999.

G.  Söderman, ?Diversity of pollinator communities in Eastern Fennoscandia and Eastern Baltics?, The Finnish Environment, vol. 355, pp. 1-74, 1999.

V.  Vikberg, ?Crossocerus assimilis and Bethylus boops, two aculeate wasps new to the fauna of Finland (Hymenoptera, Crabronidae and Bethylidae)?, Entomologica Fennica, vol. 10, pp. 245-246, 1999.

A.  Pekkarinen and Gustafsson, B., ?The Polistes species in northern Europe (Hymenoptera: Vespidae)?, Entomologica Fennica, vol. 10, pp. 191?197, 1999.

A.  Pekkarinen, ?Oligolectic bee species and their decline in Finland (Hymenoptera, Apoidea). ?, Proc. 24th Nordic Congress of Entomology, vol. 1999, pp. 151-156, 1999.

K. R.  Foster, Seppä, P., Ratnieks, F. L. W., and Thorén, P., ?Low paternity in the hornet Vespa crabro indicates that multiple mating by queens is derived in vespine wasps.?, Behavioral Ecol. Sociobiol., vol. 46, pp.  252-257, 1999.

T.  Aho, Kuitunen, M., Suhonen, J., Jäntti, A., and Hakkari, T., ?Reproductive success of European treecreepers, Certhia familiaris, lower in territories with wood ants. ?, Ecology, vol. 80, pp. 998-1007, 1999.

N.  Heidemaa and Viitasaari, M., ?Taxonomy of the Empria hungarica species-group (Hymenoptera, Tenthredinidae) in Northern Europe?, Entomologica Fennica, vol. 10, pp.  95-101, 1999.

E. R.  Guerrero and Koponen, M., ?Contribución a la fauna braconológica de las islas Canarias (Hymenoptera, Braconidae).?, Viarea, vol. 28, pp. 99-117, 1999.

M.  Koponen, ?Two species of Trachyusa Ruthe, 1854 (Hymenoptera, Braconidae, Alysiinae) in Finland. ?, Entomologica Fennica, vol. 10, pp. 199-200, 1999.

M.  Fischer and Koponen, M., ?A survey of Opiinae (Hymenoptera, Braconidae) of Finland, part 2.?, Entomologica Fennica, vol. 10, pp. 129-160, 1999.

M.  Fischer and Koponen, M., ? A survey of Opiinae (Hymenoptera, Braconidae) of Finland, part 1.?, Entomologica Fennica, vol. 10, pp. 65-93, 1999.

J. - P. C.  Bäckman and Teräs, I., ?Bumblebees in the City of Helsinki?, Proc. 24th Nordic  Congress of Entomology, 1999.

M.  Koponen, Jussila, R., and Vikberg, V., ?Suomen loispistiäisluettelo (Hymenoptera, Parasitica). Osa 3. heimo Ichneumonidae, alaheimo Cryptinae?, Sahlbergia, vol. 4, pp. 19-52, 1999.

M.  Koponen, Jussila, R., and Vikberg, V., ?Suomen loispistiäisluettelo (Hymenoptera, Parasitica). Osa 2. heimo Ichneumonidae, alaheimot Tryphoninae, Eucerotinae, Adelognathinae, Xoridinae ja Agriotypinae?, Sahlbergia, vol. 4, pp. 1-18, 1999.

R.  Jussila, ?Lounais-Hämeen ikneumonidit (Insecta: Hymenoptera, Ichneumonidae) [Ref.: Ichneumonidae (Hymenoptera) of South-West Häme]?,  Lounais-Hämeen Luonto, vol. 86, pp. 21-49, 1999.

R.  Jussila, ?Ichneumonidae (Hymenoptera) new to Finland. V.?, Entomologica Fennica, vol. 10, pp. 175-177, 1999.

R.  Jussila, ?Additions to the revision of the genus Stilpnus (Hymenoptera, Ichneumonidae) of the Palaearctic Region. I.?, Entomologica Fennica, vol. 10, pp. 107-112, 1999.